I started a dream journal a few months back, it lasted about a week. It improved my memory and control of the dreams, which I liked, but I didn't like the "shadow" that came with it. One meeting with it and sleep paralysis and I was done.

I remember watching something a long time ago about a trail like this. From what I remember, they basically laid in a medical bed and played Xbox all day for something to do. At the end of the trial, may have been four weeks, they had to undergo at least three weeks of physical therapy to get some of their strength back.